Dynamo drive for railway cars



June. 29 1926.

A.` PARENT l vYNAuo DRIvE Fon RAILWAY mms- Filed sept. 1925 Attorney Patented. June 29, 1926.

'AnEL'AR'n PARENT, or CHAPEAU, "oN-ramo, CANADA.

DYNAMO DRIVE non RAILWAY CARS.

'Application' filed Sptnibrf, 51925. Sci-'iai Nal-515,100.

The present invention pertains to a novel drive for railway cars of the type comprisinf;` a dynamo shaft 'driven from an axle of vhe car.

The usual construction 'of this character includes pulleys on the axle and ldynamo shaft and a belt trained over the'se ipu-lleys. Th device vloses in Aefficiency dueto the lfriction produced by the belt and is further hindered in cold Weather by the solidification of greasy substances accumulating on the belt.

The object of the present invention is to overcome these difficulties, and thisobj ect is attained by use of toothed Wheels on the axle and dynamo shaft With a drive chain trained over the Wheels. The chain is so constructed that the teeth of the Wheels engage in the links thereof, whereby motion is positively transmitted from the axle to the dynamo shaft Without slipping from the ilexible connecting member.

A particular feature of the invention is a novel accessory to the chain which diminishes friction between it and the toothed Wheels particularly during shifting of the chain While the car travels around a turn. This construction embodies the use of U- shaped links Which are interconnected to form the chain, and loose roller sleeves sur'- rounding the sides of the link. Consequently, if the chain shifts in any direction relative to the toothed Wheels, the resulting friction is decreased by the roller sleeves.

rThe invention is fully disclosed in the fol- .0' description and in the accompanying 'sin -which;

Figure 1 is a longitudinal section of a railway car, showing in elevation the device of he invention;

Figure Q is a plan view of the invention;

Figure 3 is a diametric section of the pulley on the dynamo shaft;

Figure l is a perspective view of one of the split sections of the Wheel on the axle; and

Figure 5 is a perspective view of a fragment of the drive chain.

Reference to these views will now be made by use of like characters which are employed to designate corresponding parts throughout.

In Figure 1 areshoWn the concerned parts of a railway car, namely, the floor 1, one of the axles 2, and a car Wheel 8 mounted on the axle.

To t-hebottom of the floor 1 is secured an adjustable bearing comprising atrackva and a hanfre'r 'rslidable on thetrack. vThe hanger justa-ble Vwith*refereiice to .thetrack by meansof screws 6 passed throughcars 7 depending from the^-encls"of the-track. lia-nger rotatably supports `afshaft-S which di-hes tl-iedynamo (not shown) carried by the car.

The "dynamo shaft -is caused Yto bedriven from the axle by toothed wheels mounted on these parts and connected by a suitable flexible member. The Wheel on the axle is a split member, each section including a semicircular core 8 and an outer concentric channel 9. These parts are joined and held in fixed relation to one another by means of spokes 10 projecting from the outer surface of the core to the inner surface of the channel. The base of the channel, that is, the part 'between the flanges, is formed with a plurality of teeth 11 the purpose of Which is pointed out belovv. The ends of each flange of the channel are provided with outwardly projected apertured ears 12 as clearly shown in Figure 4. In the assembly of a split Wheel on the axle, the ears of one section coincide With the ears of the other section and are joined by bolts 13 passed therethrough.

The vvheel on the dynamo shaft is smaller than that already described as may be seen from Figure 1. This wheel consists of a core 1% of Wood or other insulating material formed with a tapered bore 15 into Which the dynamo shaft is wedged. At one end Vof the bore is formed a socket 16 for the recept-ion of a nut or the like to be secured on the shaft in order to prevent slipping of the core. The body 17' of this Wheel surrounds the core and formed with flanges 18 at the edges thereof. Between the flanges 18 is provided a series of teeth 19 similar to the members 11 already mentioned.

r)The two toothed Wheels are connected by an endless chain consisting of a series of U- shaped links 20, the ends of each are hooked as at 21. around the bends 22 of the adjacent link. The chain is so constructed that when it is trained around the toothed Wheels the teeth 11 and 19 are received Within the links so that the chain is moved by the rotation of the toothed Wheel on the axle. This movement is transmitted to the Wheel on the dynamo shaft and causes the latter to rotate.

The sides of the links are surrounded by Thev loose roller sleeves 23. These devices diminish the friction between the chain and the toothed Wheels during the normal movement ot the chain and also When the chain shifts with reference to the Wheels While the ear is passing eL-round 2t bend.

While a speciiio embodiment of the invention has been illustrated land described, it is to be understood that various alterations in the details of Construction may be nie-de Without departing from the spirit of the invention :is indicated by the appended claims.

Having thus i'ully described the invention, what l claim es new :ind desire to proteet by Letters Patent is:

l. In combination with an axle and shaft, toothed wheels mounted on said axle und shaft, n ehuin consisting of interconnected U-shaped links trained over seid toothed wheels, the teeth of the Wheels being received in the links of the chain, and roller sleeves surrounding the sides of the links.

2. ln combination With an axle and shaft, e split toothed Wheel mounted on the axle, a toothed Wheel mounted on the shaft, a chain consisting of interconnected U-shaped links trained over seid toothed wheels, the teeth of the Wheels being received in the links of the chain, and roller sleeves surrounding the sides et said links.

A drive chain comprising e series of U-shuped links, hooks toi-med at the ends of each link and engaging the bends of the adjacent links, and rollerl sleeves loosely surrounding the sides of said links.

In witness whereof I have hereunto set my hand.

ADELARD PARENT. 

